Frequencies for first 10,000 rows of intent variable in nhamcsed2005 dataset :

            intentionality of injury |      Freq.     Percent        Cum.
-------------------------------------+-----------------------------------
                yes (self-inflicted) |        158        1.58        1.58
                       yes (assault) |        187        1.87        3.45
                   no, unintentional |      2,702       27.02       30.47
                             unknown |        540        5.40       35.87
not applicable (not an injury visit) |      6,413       64.13      100.00
-------------------------------------+-----------------------------------
                               Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 28 Mar 2016